Unakite
Epidotized Granite
metamorphic
Category
Metamorphic Rock (Primarily Composed Of Minerals)
Browse metamorphic rock (primarily composed of minerals) specimens identified by the Rock Identifier community.
Granite
Granite (phaneritic felsic intrusive rock)
igneous
Quartz on Host Rock
Silicon Dioxide (SiO2)
Mineral Specimen
Granodiorite (or Granite) Pebble
Phaneritic Felsic Igneous Pebble
igneous
Mixed Mineral Specimens
Mixed Silicates, Oxides, and Phosphates (SiO₂, Ca₅(PO₄)₃(F,Cl,OH), Na₈Al₆Si₆O₂₄Cl₂, etc.)
mineral
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Liesegang Banded Sandstone (Wonderstone)
Ferruginous Sandstone with Liesegang Rings
sedimentary
Anthracite Coal
Anthracite (Carbon-based sedimentary-metamorphic rock)
metamorphic
Pink Quartzite
Quartzite (primarily SiO2)
metamorphic
River Pebble (Quartzite/Siltstone mixture)
Silicon Dioxide (SiO2) mixture with varied clastic minerals
sedimentary/metamorphic
Granite (Pink/Red variety)
Phaneritic Felsic Intrusive Igneous Rock (composed primarily of Quartz, K-Feldspar, and Plagioclase)
igneous
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Folded Schist / Gneiss (Metamorphic Rock)
Regional Metaphoric Folded Outcrop (predominantly Schist/Gneiss)
metamorphic
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Anthracite Coal
Anthracite (Carbon-rich metamorphic rock)
metamorphic
Granite
Phaneritic Igneous Rock (composed of Quartz, Feldspar, and Mica)
igneous
Greenstone
Greenschist (containing chlorite, epidote, and actinolite)
metamorphic
Amygdaloidal Basalt with Epidote
Vesicular Basalt with secondary Epidote/Quartz mineral infill
igneous
Unakite
Epidotized Granite (Fe, Ca, Al silicate + KAlSi3O8)
metamorphic
Conglomerate (or Breccia)
Clastic Sedimentary Rock (Conglomeratic)
sedimentary
Unakite
Epidotized Granite (SiO2 with Ca2(Al, Fe)3(SiO4)3(OH))
metamorphic
Quartz (Iron-stained or Rose variant)
Silicon Dioxide (SiO2)
mineral
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Montana Moss Agate
Chalcedony (SiO2) with Manganese/Iron oxide inclusions
sedimentary
Chalk / Sedimentary Limestone
Calcium Carbonate (CaCO3) - Biogenic Sedimentary Rock
sedimentary
Garnet
Garnet Group (Silicate Minerals), formula varies e.g., Almandine Fe3Al2(SiO4)3
mineral
Diorite (Polished Cobble)
Diorite (Intermediate intrusive igneous rock)
Igneous
Conglomerate
Conglomerate (Clastic Sedimentary Rock)
Sedimentary
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Eclogite
Eclogite (Omphacite-Garnet rock)
metamorphic
Sand Grain (Silica/Quartz Grain)
Silicon Dioxide (SiO2)
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Granodiorite (foreground) and Rose Quartz (background)
Granodiorite / Quartz (SiO2)
igneous
Petrified Wood (Agatized/Silicified Wood)
Silicified Wood (SiO2 - Silicon Dioxide)
metamorphic
Quartz / Quartzite
Quartzite (primarily Silicon Dioxide, SiO2)
metamorphic
Lapis Lazuli
Complex metamorphic rock containing Lazurite ((Na,Ca)8(AlSiO4)6(SO4,S,Cl)2), Calcite, and Pyrite
metamorphic
Unakite
Epidotized Granite
metamorphic
Quartzite with Iron Inclusions
Metamorphosed Sandstone (SiO2 dominated)
metamorphic
Pyrite
Iron Disulfide (FeS2)
mineral
Diorite (River Cobble)
Phaneritic Intermediate Plutonic Rock
igneous
Milky Quartz (Quartz Vein)
Silicon Dioxide (SiO2)
mineral